Parse LED mappings in keylayout files. DO NOT MERGE

Change-Id: I2b34939cc0df256e6b872502ea93f2884b4c8334
diff --git a/libs/input/Keyboard.cpp b/libs/input/Keyboard.cpp
index b6551ee..7d4ac92 100644
--- a/libs/input/Keyboard.cpp
+++ b/libs/input/Keyboard.cpp
@@ -203,6 +203,10 @@
     return lookupLabelByValue(axisId, AXES);
 }
 
+int32_t getLedByLabel(const char* label) {
+    return int32_t(lookupValueByLabel(label, LEDS));
+}
+
 static int32_t setEphemeralMetaState(int32_t mask, bool down, int32_t oldMetaState) {
     int32_t newMetaState;
     if (down) {